This paper introduces a novel scheme of Maximum Radio Frequency Energy Harvested Antenna Selection in Two-Way Communication via two multi-antenna Relays in the presence of an interferer under eavesdropper attack. The basic objective of our work is to investigate the Secrecy Performance in Two-Way Multi-antenna Relay network with Interference-aided EH using Maximum Harvested Energy Antenna-Selection Scheme. The impact of some network parameters, namely energy harvesting coefficient, Transmit Power of Sources, Interferer Transmit Power, Global Target Secrecy Rate and no of antennas has been examined on the Secrecy capacity. Simulation results demonstrate that our proposed model improves the secrecy performance significantly as compared to its contrast models. Also a trade-off has been observed between secure transmission and reliable communication. Furthermore, these results serve as a criterion for the deployment of maximum number of antennas for two way communication to enhance the Secrecy Capacity.
This paper introduces a novel scheme of Maximum Radio Frequency Energy Harvested Antenna Selection in Two-Way Communication via two multi-antenna Relays in the presence of an interferer under eavesdropper attack. The basic objective of our work is to investigate the Secrecy Performance in Two-Way Multi-antenna Relay network with Interference-aided EH using Maximum Harvested Energy Antenna-Selection Scheme. The impact of some network parameters, namely energy harvesting coefficient, Transmit Power of Sources, Interferer Transmit Power, Global Target Secrecy Rate and no of antennas has been examined on the Secrecy capacity. Simulation results demonstrate that our proposed model improves the secrecy performance significantly as compared to its contrast models. Also a trade-off has been observed between secure transmission and reliable communication. Furthermore, these results serve as a criterion for the deployment of maximum number of antennas for two way communication to enhance the Secrecy Capacity.
In this paper, we analyze the secrecy capacity of a half-duplex energy harvesting (EH)-based multi-antenna amplify-and-forward relay network in the presence of a passive eavesdropper. During the first phase, while the source is in the transmission mode, the legitimate destination transmits an auxiliary artificial noise (AN) signal which has two distinct purposes: 1) to transfer power to the relay and 2) to improve system security. Since the AN is known at the legitimate destination, it is easily cancelled at the intended destination, which is not the case at the eavesdropper. In this respect, we derive new exact analytical expressions for the ergodic secrecy capacity for various well-known EH relaying protocols, namely, time switching relaying (TSR), power splitting relaying (PSR), and ideal relaying receiver (IRR). Monte Carlo simulations are also provided throughout our investigations to validate the analysis. The impacts of some important system parameters, such as EH time, power splitting ratio, relay location, AN power, EH efficiency, and the number of relay antennas, on the system performance are investigated. The results reveal that the PSR protocol generally outperforms the TSR approach in terms of the secrecy capacity.
In this paper, we study radio frequency energy harvesting (EH) in a wireless sensor network in the presence of multiple eavesdroppers (EAVs). Specifically, the sensor source and multiple sensor relays harvest energy from multiple power transfer stations (PTSs), and then, the source uses this harvested energy to transmit information to the base station (BS) with the help of the relays. During the transmission of information, the BS typically faces a risk of losing information due to the EAVs. Thus, to enhance the secrecy of the considered system, one of the relays acts as a jammer, using harvested energy to generate interference with the EAVs. We propose a best-relay-and-best-jammer scheme for this purpose and compare this scheme with other previous schemes. The exact closed-form expression for the secrecy outage probability (SOP) is obtained and is validated through Monte Carlo simulations. A near-optimal EH time algorithm is also proposed. In addition, the effects on the SOP of key system parameters such as the EH efficiency coefficient, the EH time, the distance between the relay and BS, the number of PTSs, the number of relays, and the number of EAVs are investigated. The results indicate that the proposed scheme generally outperforms both the best-relay-and-random-jammer scheme and the random-relay-and-best-jammer scheme in terms of the secrecy capacity.
This paper studies the secrecy performance of an energy-harvesting relaying system in the presence of a dualuse source node and an eavesdropper.Specifically, the source has dual roles in the dual-hop communication: 1) to transmit confidential information in the first hop; 2) to generate jamming signal to interfere the eavesdropper in the second hop.Moreover, the multi-antenna relay deploys a power-splitting harvesting scheme to coordinate the information receiving and energy harvesting, and adopts maximal ratio combining technique to process the multiple copies of signals.Considering decode-andforward protocol and transmit antenna selection scheme, we derive an analytical expression for secrecy outage probability, and perform Monte Carlo simulation to validate the analysis.Analytical results show that the SOP performance with the dualuse source node can be effectively improved when the relaydestination channel does not have absolute advantage over the relay-eavesdropper channel.
A novel approach comprising of "Destination-based Jamming" (DJ) technique with "Interference-assisted Energy harvesting" (EH) in a "Cooperative Network" (CN) has been discussed in this paper. Here we have studied the "Secrecy Throughput" (STP) performance of the "Decode-and-Forward Relay" (DFR) network that uses Hybrid protocol to harvest energy both from Source signal and Interferer to use it for relaying operation. The beneficial effects of interference power on the secrecy performance of DF relaying are investigated. The impact of some system parameters, such as the power splitting ratio, energy harvesting coefficient, target secrecy rate and interferer-eavesdropper distance have been studied on the system secrecy throughput. Simulation results reveal that the EH scheme proposed in this paper can achieve higher secrecy capacity than traditional relaying strategies. The main objective is to find out how much STP can be achieved by harvesting energy from an interferer (I) in the presence of an eavesdropper (EAV). The results of this paper illustrate how the interference power and jamming affect the secrecy throughput in cooperative system. In addition, these results serve as guideline on the maximum amount of interferer power that can be harvested so as to maximize the STP.
In this paper, we investigate the secrecy performance of an energy harvesting relay network, where a legitimate source communicates with a legitimate destination via the assistance of multiple trusted relays. In the considered system, the source and relays deploy the time-switching based radio frequency energy harvesting technique to harvest energy from a multi-antenna beacon. Different antenna selection and relay selection schemes are applied to enhance the security of the system. Specifically, two relay selection schemes based on the partial and full knowledge of channel state information are proposed. The exact closed-form expressions of the systems secrecy outage probability in these schemes are derived. A Monte-Carlo based simulation validates our analysis results.
This paper investigates the secrecy performance of amplified-and-forward (AF) relay wiretap model by using energy harvesting (EH) and signal alignment technique. All nodes equipped with multi antennas play different roles in terms of source, destination, relay, eavesdropper and jamming node. The jamming node designs artificial noise based on signal alignment principle, and then transmits it to the eavesdropper with harvested energy. Due to different power limitations, we propose power allocation schemes called Local Power Constraints scheme (LPCS) and Global Power Constraints scheme (GPCS), which maximize the secrecy rate of the system and obtain better secrecy performance when compared with the non-EH scheme and the partial nodes power allocation EH scheme. Furthermore, we also analyze the effect of the energy harvesting on the secure degrees of freedom (SDOF) in the high signal-to-noise (SNR) region, and simulate the secrecy performance with convex optimization method by proving the convexity of the optimization problem. Results show that the proposed schemes outperform the compared schemes on the secrecy performance, and achieve more secrecy rate when the destination and the relay have more antennas.